Airtac SAIJ100 Adjustable Cylinder SAIJ100BX155-50S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX155-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 155mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ100 mm
- Stroke155 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX155-50S
The AirTAC SAIJ100X155-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 3927N of push force at 0.5 MPa and features a 155mm nominal stroke that can be dialed back by up to 50mm, yielding a precise 105-155mm usable travel window for on-the-fly positioning.
This variant includes a SUS304 stainless steel rod for superior corrosion resistance and an integrated magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel provides standard ISO 15552 mounting dimensions, while the rear stopper allows fine end-position tuning at commissioning without adding external stops.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX155-50S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX155-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 155 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100BX155-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×155 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX155-50S Is Used
Product Changeover
Quickly dial the stroke back from 155mm to 105mm using the rear adjuster when adapting machinery to a new product size, avoiding physical cylinder swaps.
Press Fit Tuning
Fine-tune the exact end-of-stroke position during machine commissioning to perfect a 3927N press fit without machining custom spacers.
Diverter Positioning
Set precise actuation endpoints on a conveyor diverter, utilizing the SUS304 rod to withstand washdown environments in food or packaging lines.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX155-50S the Right Cylinder?
Choose this 100mm bore when an 80mm bore (2513N push at 0.5MPa) lacks the necessary thrust, but a 125mm bore is excessive. The 50mm adjustment range is ideal for product changeovers requiring significantly different end positions, unlike a fixed-stroke SAI cylinder. Remember that the rear adjuster is a travel stop, not a lock; the SAIJ does not hold loads without live air, so specify SAIL or BSAI for pneumatic locking needs.
For an exact ISO 15552 replacement match, verify the 100mm bore, 155mm stroke, 50mm adjustment, PT tapered ports, and the -S magnet. Because the stroke is under 300mm, side-load stress on the M20x1.5 rod thread is manageable, though external guides should still support heavy lateral loads.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX155-50S FAQ
At 0.5 MPa operating pressure, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. At 0.7 MPa, the push force increases to 5497N.
The rear adjuster acts as a mechanical stop that shortens the effective travel from the 155mm maximum down to as little as 105mm, creating a 50mm adjustable window. It only sets the end position and does not lock the load without continuous air pressure.
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